Context: Moncton is built on a swamp. It has _a lot_ of mosquitoes during summer and 3 to 5 ft of snow during winter. It had (has?) the lowest home prices in all of Canada because of this. NB also has the lowest income per family (or next to lowest, Nunavut might be lower).
MS is more common in northern climates as well, but afaik it's not higher than average in NB.
Source: I have spent quite a bit of time in Moncton.